diff --git a/apps/DeepFaceLive/backend/StreamOutput.py b/apps/DeepFaceLive/backend/StreamOutput.py
index 3ce04fd..251ae12 100644
--- a/apps/DeepFaceLive/backend/StreamOutput.py
+++ b/apps/DeepFaceLive/backend/StreamOutput.py
@@ -138,7 +138,8 @@ class StreamOutputWorker(BackendWorker):
     def hide_window(self):
         state, cs = self.get_state(), self.get_control_sheet()
         if self._wnd_showing:
-            cv2.destroyWindow(self._wnd_name)
+            cv2.destroyAllWindows()
+            #cv2.destroyWindow(self._wnd_name) # requires check if window exists
             self._wnd_showing = False
 
     def on_cs_show_hide_window_signal(self,):